Abstract
Single crystals of K1.10Zr2Se6, Rb0.80Zr2Se6 and Cs0.80Zr2Se6 were obtained by reacting powdered mixtures of A2Se (A=K,Rb,Cs), Zr and Se at 850°C. K1.10Zr2Se6 and Rb0.80Zr2Se6 crystallize in space group Immm (Z=2), with a=3.746(3), b=5.354(8), c=21.929(3)Ä and a=3.756(1), b=5.354(8), c=22.81(1)Ä, respectively. Cs0.80Zr2Se6 crystallizes in space group Cmc21 (Z=2), with a=3.747(1), b=24.102(5), c=5.332(2)Ä. The compounds are characterized by complex anionic layers 2_oo[Zr2Se6]x- with intercalated alkali cations. As in ZrSe3, the layers are built from columns of trigonal prisms 1_oo[ZrSe3], connected by additional waist contacts, yielding an eightfold coordination for the Zr atoms. The mean Zr-Se bond lengths correspond to those found in the binary compound. The Se-Se bond lengths are significantly altered, however, indicating a reduction of the Se-Se bond order due to the electron transfer from the alkali metal.
| Original language | English |
|---|---|
| Pages (from-to) | 1265-1269 |
| Number of pages | 5 |
| Journal | Zeitschrift für Naturforschung B: A Journal of Chemical Sciences |
| Volume | 57 |
| Issue number | 11 |
| DOIs | |
| Publication status | Published - Oct 2001 |
Fields of science
- 103040 Photonics
- 104 Chemistry
- 104003 Inorganic chemistry
- 104008 Catalysis
- 104011 Materials chemistry
- 104015 Organic chemistry
- 104016 Photochemistry
- 104021 Structural chemistry
- 106 Biology
- 106002 Biochemistry
- 106032 Photobiology
- 107002 Bionics
- 209001 Biocatalysis
- 209004 Enzyme technology
- 210002 Nanobiotechnology
- 210005 Nanophotonics
- 211908 Energy research
- 211915 Solar technology
- 301114 Cell biology
- 301305 Medical chemistry
- 301904 Cancer research